#2 Kastos Manolas
Arsenal's defence improved significantly under Unai Emery and the Gunners have conceded just 13 goals in the opening ten matches. However, their defence still looks average if we compare them with the likes of Manchester City and Liverpool. Hence, they need a new centre-back to take their backline to the next level.
Quick, strong and an absolute monster in the air, Kostas Manolas is one of the best defenders in Serie A ever since he arrived at the Italian capital from the Greek club, Olympiacos in a £10.3m deal in 2014.
He would bring composure to the Arsenal's backline that the Emirates stadium is lacking and would provide added insurance for goalkeeper Bernd Leno. He is very confident with the ball at his feet and completed 388 passes in the league with an accuracy of 89.4%.